Improvement in tongueing and grooving knives



W. B. MCCLAIN improvement in Tonguing and Grooving Knives.

PatentedOct-15,1872.

UNITED STATES WILLIAM B. MOGLAIN, or SANDUSKY, oruo.

IMPROVEMENT IN TONGUEING AND GROOVING KNIVES.

Specification forming part of Letters Patent No. 132,303, dated October15, 1872.

To alkwhom it may concern:

Be it known that I, WILLIAM B. MGCLAIN, of Sandusky, in the county ofErie and State of Ohio, have invented a new and useful Improvement inTon guein g and Groovin g Knives, of which the following is aspecification:

In the accompanying drawing, Figure 1 is a face View; Fig. 2, an edgeview; and Fig.3, a longitudinal section on the line 0 c, Fig. 1, of myimproved grooving-knife.

Similar letters of reference indicate corresponding parts.

This invention has for its object to make tongueing and grooving knivesadjustable, so as to enable their use for larger or smaller tongues,deeper or shallower grooves, without requiring their removal from thecutter-head. This invention consists in making each cutter in threeparts, the middle projecting or receding part being lengthwiseadjustable between the others for the purpose indicated.

In the accompanying drawing, A represents a grooving-knife made of threepieces; a, I), and d. The middle piece 1) projects with its cut-tin gend beyond the ends of the side pieces a d to form the groove, and isheld to the others by means of a screw, 0, passing through slots orrecesses in a and b, as indicated. The cutter b can, by this screw, befastened to project more or less beyond the cutters a d, and to cut,therefore, a deeper or shallower groove. For a tongueing-knife the samearrangement is made, except that the middle adjustable kniferecedeswhere the knife 1) projects.

The advantages of this invention are manifold, as they allow the use ofthe same set of cutters for different work, and admit the adjustment ofthe same without removal from the heads.

, Having thus described myinvent-ion, I claim as new and desire tosecure by Letters Patcut- A three --part compound ton gueing andgrooving knife, having the middle one 1) slotted, and adjustable on acla1np-screw,e, as and for the purpose described.

WILLIAM B. MOGLAIN.

Witnesses CHAS. Onoss, J. L. MOORE.

